1.面向对象的概念：
1）一切事物皆对象。
2）对象具有封装和继承特性。
3）信息隐藏。
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例：
Literal.js
var person={
name:"yanxiaoyuan",
age:30,
eat:function(){
alert("能吃。");
}
}
alert(person.name);
index.html
<script src="Listeral.js"></script>
结果：界面弹出提示框“yanxiaoyuan”.
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函数构造器构造对象：
function Person(){
}
person.prototype={
name:"yanxioayuan",
age:12,
eat:function(){
alert("我在吃。");
}
var p=new Person();
p.name//可以用这些参数调用
}
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深入JAVASCRIPT的面向对象
例：function People(){
}
People.prototype.say=function(){
alert("hello");
}
function Student(){
}
Student.prototype=new People();
var superSsay=Student.prototype.say;
Student.prototype.say=function(){
superSsay.call(this);
alert("stude-hello");
}
var s=new Student();
s.say();
结果：弹出提示框“hello”确定后，弹出"stude-hello"。
~~~~~~~~~~~~~~~~~
例：function People(name){
this._name=name;
}
People.prototype.say=function(){
alert("hello"+this._name);
}
function Student(name){
this._name=name;
}
Student.prototype=new People();
var superSsay=Student.prototype.say;
Student.prototype.say=function(){
superSsay.call(this);
alert("stude-hello"+this._name);
}
var s=new Student("yanxioayuan");
s.say();
结果：
~~~~~~~~~~~~~~~~~~~~
例：隐藏例子
(function(){
var n="yanxioayuan";
function People(name){
this._name=name;
}
People.prototype.say=function(){
alert("hello"+this._name);
}
window.People=People;
}());
(function(){
function Student(name){
this._name=name;
}
Student.prototype=new People();
var superSsay=Student.prototype.say;
Student.prototype.say=function(){
superSsay.call(this);
alert("stude-hello"+this._name+n);
}
window.Student=Student;
}());
var s=new Student("yanxioayuan");
s.say();
结果：
注意：n为隐藏对象。
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~····
例：(function(){
var name="yanxiaoyuan";
function Person(name){
var _this={}
_this._name=name;
_this.sayHello=function(){
alert("pHello"+_this._name+name);
}
return _this;
}
window.Person=Person;
}());
function Teacher(name){
var _this=Person(name);
var superSay=_this.sayHello;
_this.sayHello=function(){
superSay.call(_this);
alert("THello"+_this._name);
}
return _this;
}
var t =Teacher("yanxiaoyuan");
t.sayHello();
结果：
